Artículo
Environmental history of one of the largest freshwater neotropical fish ( Zungaro jahu ) from otolith isotopic analysis
Avigliano, Esteban
; Pouilly, Marc; Vargas, Facundo; Penha, Jerry; Silva, Natalia Andrea
; Bouchez, Julien; Sánchez, Sebastián
; Volpedo, Alejandra
Fecha de publicación:
03/2023
Editorial:
John Wiley & Sons Ltd
Revista:
River Research And Applications
ISSN:
1535-1459
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The Manguruyú Zungaro jahu, endemic to the La Plata Basin, is one of the largest neotropical fish species whose life history is virtually unknown. The objectives of this study were to determine if Z. jahu is a large-scale migratory species and to describe habitat use throughout ontogeny using the otolith Sr isotope (87Sr/86Sr) ratio. Surface water samples were collected in 2020 at four sites representing the main water courses of the Great Pantanal in Brazil (upper Paraguay, Cuiabá, Sao Lourenço and ˜ Vermelho rivers). Eighteen fish individuals were collected from the Paraná River (Argentina). New water 87Sr/86Sr data were incorporated into previously established statistical models to infer the fish habitat use through the otolith 87Sr/86Sr ratios. The water 87Sr/86Sr ratio of the upper Paraguay tributaries varied (0.7209 and 0.7229) and were the highest in the La Plata Basin. The dispersal area of Z. jahu was restricted to the surroundings of the confluence of the Paraná and Paraguay rivers. Fish showed chemical signatures compatible with those of the middle Paraná (88%), Paraguay-Pilcomayo-Bermejo (50%) and the lower/upper Paraná (66%). The discriminant analysis based on otolith core indicated natal origins from the middle Paraná (37%), upper Paraná (32%), and Paraguay sub-basin (32%). The dispersal area of Z. jahu migrations could be restricted to the surroundings of the confluence of Paraná and Paraguay, which highlights the need to review regional fishing regulations, especially between latitudes 30°–34° S
Palabras clave:
endangered fish,
,
Manguruyú,
,
natal origin,
,
otolith chemistry
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Articulos(INPA)
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Articulos de UNIDAD EJECUTORA DE INVESTIGACIONES EN PRODUCCION ANIMAL
Citación
Avigliano, Esteban; Pouilly, Marc; Vargas, Facundo; Penha, Jerry; Silva, Natalia Andrea; et al.; Environmental history of one of the largest freshwater neotropical fish ( Zungaro jahu ) from otolith isotopic analysis; John Wiley & Sons Ltd; River Research And Applications; 39; 5; 3-2023; 887-896
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